Watlow Series 92 - Manual (Page 2)

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WATLOW Series 92 User's Manual
The Watlow Series 92 is a DIN rail-mounted (DIN EN
50022) analog control. If a DIN rail is not available, the
Series 92 can be mounted using two screws. The
control mode is ON/OFF, limit or PI. The input for the
Series 92 is a single Type J, K or T thermocouple, or
DIN curve RTD sensor input. For the output device,
choose from an electromechanical relay, switched DC
voltage (open collector), solid state relay, or an optional
variable burst-fired output.
Variable burst-fired is only
available with the PI version, and can be used with DC
input solid state relays. Set point options include a
remote or integral setpot assembly.
General Description
Specifications
Control Mode
• Heat or cool, factory selectable.
ON/OFF
• Switching hysteresis: Typically 3°F/1.7°C
PI: Time proportional with automatic reset
• Proportional band adjust: Typically 5 to 50°F/2.8 to
27.8°C
• Cycle time, fixed: Typically 6 seconds
• Automatic reset, fixed: Typically 0.25 repeats/minute
Limit
• Latching
• High or low, factory selectable
• Internal reset switch and/or customer supplied
remote reset switch. Automatic reset on power loss.
Operator Interface
• LED indication of limit condition or status of load.
• Setpot.
• Dial scale calibrated to compensate for sensor
non-linearities.
• Dual °F & °C scales.
• Remote or integral.
Input
• Thermocouple or RTD available.
• Thermocouple may be isolated or grounded.
• Thermocouple, automatic cold junction compensation.
• RTD input 2 or 3 wire, platinum 100 @ 0°C cali-
brated for #3850 (DIN): 0.003850 / °C. Contact
Watlow for #3916 (JIS) 0.003916 / °C)curve.
• T/C and RTD sensor break protection de-energizes
output to protect system.
• Sensor and ranges available:
Thermocouple
J1: J t/c
32 to 600°F or 0 to 315°C
J2: J t/c 32 to 1382°F or 0 to 750°C
K1: K t/c 32 to 2282°F or 0 to 1250°C
T1: T t/c -328 to 662°F or -200 to 350°C
RTD
P1:
-328 to 1112°F or -200 to 600°C
• Lead resistance effect for type J, K, or T thermo-
couple input: 200 of lead resistance will cause
less than 1°F error. Refer to the lead wire
manufacturer's specification on ohms per double
foot for type and gauge of wire.
Output
• Electromechanical relay, Form C, 5A @ 120/
240VAC. Minimum offstate impedance is 20K .
Warranted to 100,000 cycles.
• Solid State Relay, Form A, 0.5A @ 24 VAC mini-
mum, 264 VAC maximum, opto-coupled, zero-
crossed switching. Minimum off state impedance
is 20K for output "B", and 31M for output "K".
• Open collector, switched DC signal provides a
minimum turn ON voltage of 3VDC into a minimum
500 load; maximum ON voltage not greater than
32VDC into an infinite load.
• Variable time base, open collector, switched DC,
Form A signal provides a minimum turn ON voltage
of 3VDC into a minimum 500 load; maximum ON
voltage not greater than 32VDC into an infinite load.
Available for PI control only.
Accuracy
• Calibration accuracy and sensor conformity:
± 1% of span maximum, at 77°F ± 5°F (25°C ± 3°C)
ambient and rated line voltage.
• Setpoint Accuracy: < ± 3% of range.
• Temperature stability: Typically ± 5µV / °F ambient
for thermocouple. Typically < 1°F from 32 to 130°F
for RTD.
• Voltage stability: ± 0.01% of span / % of rated line
voltage.
Agency Approvals
• UL, CSA and FM pending.
• Patent pending.
Terminals
• Captive screw, cage clamp connection. 0.155"
(4mm) maximum diameter screwdriver blade.
22 - 12 maximum wire gauge
Power
• Factory selectable.
• 120VAC: 85 to 132VAC, 50/60 Hz.
• 208/240VAC: 175 to 264VAC, 50/60 Hz.
• 6VA power consumption.
Operating Environment
• 30 to 140°F/0 to 60°C.
• 0 to 90% RH, non-condensing.
• Storage Environment: -40 to 158°F/-40 to 70°C.
Weight
•
Control: 0.75 lb (0.34kg)
• Setpot: 0.20 lb (0.09kg)